iMovie 09, setting all clips to 'fit' mode

I'm currently making an experiment that requires taking loads of pictures and then putting them into a video for analysis. However when I import them to iMovie 09, it gives the Ken Burns effect, which I don't like. I have to have the pictures in the 'fit' mode when cropping. I can change this feature manually for each picture but this takes a lot of time.

Is there a way in which I can set all the images to have the 'fit' mode? I appreciate your help.